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chromium/third_party/blink/web_tests/external/wpt/hr-time/resources/now_frame.html 

<!DOCTYPE HTML>
<html>
    <head>
        <meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
        <title>window.performance.now frame</title>
        <link rel="author" title="Google" href="http://www.google.com/" />
    </head>
    <body></body>
</html>